An Organometallic Erbium Bismuth Cluster Complex Comprising a Bi₆^6– Zintl Ion

Abstract

An organometallic erbium bismuth cluster complex, [K(THF) 4 ] 2 [Cp* 2 Er 2 Bi 6 ] (1), featuring a heterometallocubane core was isolated. The cube emerges from the rare Bi 6 6− Zintl ion, bridging two erbium centers for the first time. SQUID magnetometry and ab initio calculations uncovered dominant antiferromagnetic coupling enabled through the chair-like hexabismuth anion. The gained insight will promote the design of future polynuclear magnetic molecules comprising prolate lanthanide ions.